Machine for coiling metal strip



April 9, 1935. M, NIGRO 1,997,197

MACHINE FOR COILING METAL STRIP Filed May 6, 1952 5 Sheets-Sheet 1 L lnv'enl'or ch 9! nigr o 6 2 AHOY-neg April 9,1935; M. NIGRO I 1,997,197

MACHINE FOR COILING METAL STRIP Filed May 6, 1932 3 Sheets-Sheet 2 mic/191 nigro by AH orneg April. 9, 1935. M. NIGRO 1,997,197

MACHINE FOR COILING METAL STRIP Filed May 6, 1932 s Sheets-Sheet s Fiyc4 lnlren tor michel nigro AHOY-neg Patented Apr. 9, 1935 I 1 997,197

UNITED STATES PATENT OFFICE" MACHINE FOR COILING METAL STRIP Michel Nigro, Worcester, Mass, assignor to Sleeper & Hartley, Inc., Worcester, Mass, a corporation of Massachusetts Application May 6, 1932, Serial No. 609,700

14 Claims. (01. 153-645) The present invention relates to the coiling of 3 is provided at its forward end with a radial metal strip, on edge, for the purpose of producing fla e O which the flier, indicated generally helical forms of varying pitch and diameter. at 6, gs mounted and Said Sleeve has The invention contemplates the provision of incured thereto between the upstanding portions 2 5 strumentalities particularly adapted forproduca sprocket I by which the sleeve 3 is rotated as 5 ing helical forms closely encircling a supporting will hereinaf er p member, or core, with the convolutions of the The flier 6, Fig. 3, comprises members 8 and I0, helix uniformly spaced and with the wound strip the former of which is secured to the radial providing corrugations closely engaging the core; flange 5 of the sleeve 3 by Screws II a As will hereinafter appear, a helical form promembers are suitably secured together for rol0 duced by practice of the invention is particularly tatien, a8 a unit, with thedrive for the mechsuited for use in connection with the radiation anism which feeds the strip material a mounted of heat from a rod or a pipe, around which the in an op 9 between said members- T form is coiled. Due to the uniform spacing of strip material a i carried on a reel Supported the convolutions of the coil and the provision of on guide rolls, not shown, mounted on the flier l5 corrugations, or fins, in the strip closely engagto permit rotation of said reel relative to the ing the supporting rod or pipe, a maximum. h at flier and the strip material is drawn from said reel radiating effect is obtained, thereby adapting I: over guide rolls l3, carried on brackets l4 sethe product of theinvention foruseinheating or lt0 the flier, y a feeding d fOrming "2o r'efrigeratlng'installations, or for other analogous mec nism 5 carr ed o he fl purposes. The feeding and forming mechanism turns the In carryingout the coiling operation, crimped strip material a into a plane perpendicular to strip is fed on edge, at a predetermined rate, to the i the coil a rms uniform a coiling tools rotatable about the coiling axis, and verse corrugations in the strip. This mechanism as the strip is wound, the outer edge thereof is which is best Shown in 6,. p s 25 flattened. The increase in length of one edge of P of u d r0118 mounted on Parallel axes the strip, resu1ting from the flattening, not only Perpendicular t0 the axis of the fl said r0115 assists in the coiling action, but also causes the twisting t Strip m r l a as i Passes crimping along the other edge, on-the inside of tween said rolls from the guide roll 13 into a the cofl, to draw together and very closely engage plane perpendicular to the axis of the flier. From 30 a rod or pipe on which the helix is being would the guide rolls, the strip material passes between Other and further objects and advantages of P 0f p g and feeding r0118 the D the invention will appear from t following ripheries of which rolls'are corrugated for crimptailed description, taken in connection with the s s id st ip. s i l s bei driven i timed accompanying drawings, in m h; lation to the rotation of the flier to procure a pos- '35 Fig. 1 is a front elevation of a machine emitive feeding movement of the strip material as bodyins the invention. 1, the flier rotates.

Fi 2 is a side elevation of the machine of rring now to Fig. the Sl v 3 has a hol- Fig. 1. low sleeve |8 extending therethrough, said sleeve Fig, 3 i a, fragmentary section through t l8 being mounted-for rotation within the sleeve 0 flier substantially along the in 3 3 of Fig 1, 3 with the forward end of the sleeve l8 supported Fig. 4 is a plan view showing the drive for th by an anti-friction bearing member IS, the outmachine, parts being broken away. er race of which is mounted in the member 8 K Fig. 5 is an enlarged fragmentary section and with the rearwardend of said sleeve l8 jourth h t coiling 11 L naled in a bracket 20 carried by one of the 45 Fig. 6 is a horizontal section substantially p di Po i A .SD gear 2| is along the line 66 of Fig. l. cured to the sleeve l8 between the members 8 Fig. 7 is a perspective view of a coil formed by and I0 and meshes wth a spur gear 22, Fig. 1, a the machine. journaled on a stud 23 carried by said members.

' Like reference characters refer to like parts The gear 22 meshes with an idler gear 24 jour- 50 throughout the drawings. naled on a stud 25, said idler gear being in en- Referring to Figs. 1 and 3, the machine comgagement with a pinion gear 26 secured to a prises a base I having spaced upwardly extending shaft 21 journaled in the member to. A bevel portions 2 in which a hollow sleeve 3 is rotatably gear 28 is secured to the forward end of the shaft supported'by anti-friction bearings l. The sleeve 21 and meshes, with a bevel gear 30 secured to 55 the lower end ofa shaft 3| to the upper end of which one of the crimping rolls I1 is secured; see Fig. 6. Rotation of the crimping rolls I1 is thus procured in response to rotation of the sleeve l8 relative to the flier.

As above stated, the rolls H are driven in timed relation to the flier and this timed relation is variable to procure a faster or slower speed as desired. To this end, the sleeve 3 which carries the flier has a sprocket 32, Figs. 2 and 3, secured to the rearward end thereof, and said sprocket is connected by'a chain 33 to asprocket 34 of a reduction gear set 35 of the usual construction. The driven sprocket 36 of said reduction gear set 35 engages a chain 31 which passes over a sprocket 38 secured to the rearward end of the sleeve 6. The reduction gear set 35 is adjustable to procure various speed ratios between thesprockets 34 and 36, thereby to vary the relative rates of rotation of the sleeve 3 and the s1eeve-|8. Thus the rate of movement of the strip material .a between the rolls may be varied by adjustment of said gear set 35 with said feed rolls driven in timed relation to the sleeve 3.

Referring now to Fig. 3, a sleeve 40 -is mounted within the sleeves 3and l8 and is supported therein at the forward end by anti-friction bearings 4| between said sleeve 40 and the member ID. The rearward end of said sleeve is mounted inthe bracket 20 and secured against rotation therein by a key 42. An arbor 43 which is mounted in the forward end of said sleeve has an axial opening therethroughfor the reception of a coiling core or pipe 44 which is fed through said arbor and upon which the strip material a is coiled as it is fed by the rolls H, with coiling rolls 45 and 46 cooperating with said arbor in forming the strip into a helical coil about said pipe.

' The coiling roll 45 is driven in timed relation to the flier and operates to iron out the crimps or corrugations in the outer periphery of the helix to form the structure of Fig. 7 which will be hereinafter more completely described. Referring to Fig 3, the coiling roll 451s carried by a bracket 41 mounted on the face of the flier member I8, said bracket having a shaft 48 journaled in anti-friction bearings 58 parallel to the axis of the flier to which said roll is secured. A pinion is also secured against rotation on said shaft and engages with pinion teeth 52 formed on the periphery of the arbor 43. A thrust bearing 53 supports the shaft 48 against endwise movement resulting from the action of clamping the strip material a between a shoulder 54 on the roll 45, and a corresponding shoulder 55 on the arbor 43, see Fig. 5. An adjusting nut 53a cooperating with the bearing 53 determines the position of the roll 45 with respect to arbor 43, and as the flier rotates, pressure between the opposed shoulders 54 and 55 flattens the strip around the outer periphery'of the coil being formed. The nut 53a permits the pressure exerted by the roll 45 to be varied in order to obtain the desired degree of flattening. Radial adjustment of the roll 45 is obtained by means of a screw 56 in threaded engagement with the bracket 41, the screw being turnable in a lug 56a provided by the flier portion ID.

The coiling roll 46 is arranged for free rotation and for holding the flattened periphery of the strip a against theshoulder 55 on the arbor in the 1 formation of the helix. The roll 46 is journaled on anti-friction bearings 51 and is carried by a bracket 58 which is adjustable radially relative to the axis of the flier by an adjusting screw 59 to permit the formation of coils of varying diameters.

The opposite sides of the coiling rolls 45 and 46 adjacent the periphery converge to form a tapering edge on said rolls which extends between adjacent coils of the helix as it is formed on the core and the forward end of the arbor 43 is undercut as indicated at 60. Therefore, the spacing between the side-faces of the rolls 45 and 46 and the end of the arbor 43 is great enough to accommodate the crimps in the strip material and to detime the depth of said crimps which become substantially deeper adjacent the inner portion of the helix during the formation of the coil. Since the diameter of the arbor in the portion where the gear teeth 52 are formed corresponds to the diameter of the outer periphery of the coil being formed, the coiling roll 45 procures an ironing or rolling action on the periphery of said helix which procures the desired flattening effect without excessive frictional engagement between the coil the annular shoulder 55 on the arbor corresponding in diameter to the outside diameter of the ,coil being formed. Obviously the diameter of the pinion gear teeth 52 on the periphery of the arbor 43 corresponds to the diameter of the annular shoulder.

As above pointed out, the pipe or core 44 on which the coil is formed is moved in timed relation to the rotation of the flier. Referring to Fig. 4, the motor 6| carries a pinion 62 in mesh with a loose gear 63 on a drive shaft 64, the shaft carrying a sprocket 65 connected to the sprocket on the sleeve 3 by a chain 66 to procure rotation of the flier. A sleeve 61 carrying the gear 63 is adapted to be connected to the shaft 64 by a clutch mechanism 68 of any suitable construction and the shaft 64 carries a worm, not shown, which meshes with a worm gear 69 on a shaft 10. A gear H which is also secured to the shaft 10 meshes with a gear 12 on a countershaft 13, the latter carrying a gear 14 meshing with a gear I5 secured to the rearward end of a shaft 16 journaled in a housing 11 which carries the core feeding rolls. The forward end of the shaft 16 carries the lower core feeding roll 18, Fig. 2 and has secured thereto a pinion, not shown, which meshes with a gear 88 on a shaft 8| also journaled in the housing 11. The forward end of the shaft 8| carries the upper feeding roll 82, the latter being adjustable vertically by a hand wheel 83 to procure a more or less positive clamping engagement between said rolls I8 and 82 to provide for a positive feeding movement of the core therebetween. Since the rotation of the rolls I8 and 82 is positively procured from the same shaft 64 which drives the flier and the associated mechanism, the core 44 is fed in timed relation to the rotation of the flier 6.

The helical form produced by operation of the above described mechanism is shown in Fig. 7, in which the pipe 44 has a helical coil 84 wound thereon with elements of said coil substantially perpendicular to the axis of the pipe. is provided with corrugations or crimps 85 which are of substantial depth adjacent the inner periphery of said coil and which gradually diminish toward the outer periphery 86 which is substantially flat. It will be noted that successive coils The coil of the helix are uniformly spaced apart on the core.

In the operation of the machine, the strip material which is carried on the reel I2 is drawn therefrom over the rolls l3 by rotation of the crimping rolls I1 in response to rotation of the sleeve l8 which in turn is driven by rotation of the sleeve 3. Thecrimping rolls I'I form corrugations in the strip material a and feed it at a predetermined rate between the coiling roll 45 and the arbor 43 which cooperate, as above pointed out, to iron out the corrugations in the outer edge of said strip, thereby lengthening said edge and causing the strip to coil around the pipe, this coiling action being aided somewhat by the axial surface 81 formed by the shoulder 54. As the flier continues to rotate, the coiling roll 46 engages the strip material a and aids in the formation of the coil, said roll also maintaining consecutive-coils spaced apart, as shown in Fig. 5. As the feeding action of the rolls I1 is adjustable, as above pointed out, the length of strip material fed for each rotation of the flier may be accurately determined so that the strip material is coiled on the pipe suiflciently tight to prevent subsequent shifting of the coils axially of said pipe. Furthermore, the elongation of the outer edge of the strip due to the flattening causes the crimps 8! to be forced together to closely embrace the pipe. During the formation of the coils on the pipe, the latter is fed in predetermined timed relation to the rotation of the flier and accordingly determines the pitch of the helix since the core 44 is fed forwardly a predetermined distance for each rotation of the flier.

In order to support the forward end of the core against vibratory movements as a result of the coiling action, said end is carried by a horizontally movable carriage 88 which is movable on a horizontal guideway 90 supported by a stand 9|, the core being supported ina clamp 92 on the carriage. As, the core is fed and the strip coiled thereon, the carriage moves away from the machine.

From the foregoing, it will be apparent that by the present invention there is provided an improved method and machine for coiling helical forms from crimped metallic strip.

I claim, 1

1. In a machine of the class described, the com bination with a rotatable flier for carrying a sup ply of strip material, and strip feeding and crimping means carried by said flier, of a positively driven coiling roll onsaid flier arranged to flatten out the corrugations along one edge of said strip.

2. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material, and strip feeding and crimping means carried by said flier, of a coiling roll driven in timed relation to the flier, said roll operating to flatten out the corrugationsin one edge of said strip.

3. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material, and strip feeding and crimping means carried by said flier, of a coiling roll driven in timed relation to the flier, said roll operating to flatten out the corrugations in one edge and operating to flatten out the crimps in one edge of the strip for forming said strip into a coil with crimps in said strip extending at right angles to the axis of the core.

5. In a machine for coiling strip material on a core, and means for feeding the core in timed relation to the rotation of the flier.

6. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material-and strip crimping means carried by said flier, of a positively driven coiling roll on said flier operating to flatten out the corrugations in one edge of said strip.

'7. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material, and strip crimping means carried by said flier, of a coiling roll driven in timed relation to the flier and operating to'flatten out the corrugations in one edge of said strip.

8. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material, and strip crimping means carried by said flier, of positively driven means on the flier for flattening out the corrugations in one edge only of said strip.

9. In a machine of the class described, the com: bination with a rotatable flier for carrying a supply of strip materiaL'and strip crimping means carried by said flier, of a coiling roll driven in timed relation to the flier and operating to flatten out the corrugations in one edge of said strip, and means for controlling'the degree of flattening of said strip by said roll.

10. In a machine for coiling strip material, the combination with a rotatable flier for carrying a supply of strip material, of strip feeding and crimping rolls carried by said flier and driven in timed relation thereto and positively driven coiling means carried by said flier and operating to flatten out the crimps in one edge of the strip for forming said strip into a coil with the crimps therein extending at right angles to the axis of the coil.

11. In a machine of the class described, the

combination with a rotatable flier for carryinga supply of strip material, a tubular guide extending axially through said flier,means for feeding a tube through said guide and means for driving said flier, of a coiling roll rotatably mounted on said flier with its periphery overlapping the adjacent end of said guide, and means" carried by the flier to positively feed, for each revolution of the flier, a predetermined length of strip material between opposed surfaces of said coiling roll and of said guide to wind the strip in spiral form on said tube.

12. In a machine of'the class described, the combination with a rotatable flier for carrying a supply of strip material, a tubular guide extending axially through said flier, me'ans forfeeding a tube through said guide and means for driving said flier, of a coiling roll carried by said flier with its periphery overlapping the adjacent end of said guide, means for rotatably drivingsaid coiling roll from said flier, a pair of feeding rolls mounted on said flier, and means for variably driving said feeding rolls in unison with said flier to cause said rolls to positively feed, for each revolution of the flier, a predetermined length of strip between opposed surfaces oi said coiling roll and 0! said guide.

13. In a machine of the class described, the combination with a rotatable flier for carrying a supply oi! strip material, a tubular guide extending axially through said flier, means for feeding a tube through said guide and means for driving said flier, of a coiling roll carried by said flier with its periphery overlapping the adjacent end or said guide, means for rotatably driving said 4 coiling roll from-said flier, a pair of corrugated rolls rotatably mounted on said flier, and means for driving said rolls in timed relation with said flier for causing said rolls to crimp the strip material and positively feed, for each revolution 01' the flier, a predetermined length of crimped strip between opposed faces of said coiling roll and said guide.

14. In a machine of the class described, the combination with a rotatable flier for carrying a supply of strip material, a tubular guide extending axially through said flier, means for feeding a tube through said guide and means for driving said flier, of a coiling roll carried by said flier with itsperiphery overlapping the adjacent end 01' said guide, means for rotatably driving said coiling roll from said flier, a pair ofcorrugated rolls rotatably mounted on said flier, and means for driving said rolls in timed relation with said flier for causing said rolls to crimp the strip material and positively feed, for each revolution of the flier, a predetermined length of crimped strip between opposed faces of said coiling roll and said guide to wind the strip in spiral 'form on said tube, with its outer edge flattened by passage between said coiling roll and guide.

MICHEL NIGRO. 

